I bought this set to use it as a silent kit similar to this one, but for a cheaper price. Millenium Hybrid Practice Drum Set BL
The shells and the hardware are of surprisingly good quality with the following exceptions:
The seat foam is very weak, when you sit on it, its 5cm thickness will collapse into a few mm. I expected it to last for a few days only, however after half a year, there is still no damage yet, but the fact that the foam has zero resistance and sitting on it feels like sitting on a hard wood bench is still weird.
Some of the kickdurm lugs are deformed as well as one of the rims were quite oval. With some stretching and tweaking it is useable however. The rest is absolutely OK, after half a year they are good as new.
You cannot see this in the pics, the kit is not simply black, but the finish has sparkles, looks great in sunlight, nice surprise.
The hihat sounds nice, the crash/ride is as musical as a tin sheet would be.
The drum heads are absolutely rubbish, the material reminds me of yogurt cups. Since I use the kit with mesh head, I have no idea how it would sound with proper drumheads, so I did not want to evaluate that aspect, but I cannot send it without that. I use it with duct tape to get some sound like in this video ( kick is absolutely OK, the snare is not too nice but useable, probably replacing the cheap resonant head would make it better. I guess I would give it a 4*.
All in all, despite its minor flaws the kit is real value for money. I wish we had something like this available in the 90s, when I started to play music in my teens with very low budget.
My suggestion would that instead of the more expensive MX420, Thomann should offer a practice kit based on this set.